Differential Ring and Pinions

Choosing the right Ring & Pinion can be challenging. Knowing which ratio, spline count, material, and shaft diameter to choose from can trip up even the most experienced mechanic. Speedway Motors offers a huge selection of Ring & Pinions and the best techincal support around to help make sure you get the right parts for your car. All our Ring and Pinions offer exceptional strength and service life at a price that can't be beat!

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Many 8.5 Inch ring and pinion ratios to choose from.

8.50" diameter ring gear

1.625" diameter pinion

10 ring gear bolts

10 cover bolts

30 pinion splines

Uses LH thread ring gear bolts - 7/16"-20

8.5 R&P

Note: When replacing a stock 2.56 (or numerically lower) ratio 8.5 Inch Ring and Pinion, the carrier must also be replaced with a 2.73 or higher ratio's carrier to compensate for the difference in ring gear thickness.

This labor option is only available on Ford 9" ring gear when you purchase your new ring and pinion of a 3.89 and higher ratio. Due to the size of the ring gear, this option will not be applicable to a 3.70 and lower ratio.

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